title: Connecting viruses to cancer: how research moves from association to causation.
mesh_terms: D000818:Animals; D015984:Causality; D006801:Humans; D009369:Neoplasms / Q000453:epidemiology / Q000821:virology*; D011230:Precancerous Conditions / Q000821:virology; D011519:Proto-Oncogenes; D012307:Risk Factors; D014777:Virus Diseases / Q000150:complications*